Tags

Type your tag names separated by a space and hit enter

An exceptionally preserved association of complete dinosaur skeletons reveals the oldest long-necked sauropodomorphs.
Biol Lett. 2018 11 21; 14(11)BL

Abstract

The rise of sauropodomorphs is still poorly understood due to the scarcity of well-preserved fossils in early Norian rocks. Here, we present an association of complete and exceptionally well-preserved dinosaur skeletons that helps fill that gap. They represent a new species, which is recovered as a member of a clade solely composed of Gondwanan Triassic taxa. The new species allows the definition of a set of anatomical changes that shaped sauropodomorph evolution along a period from 233 to 225 Ma, as recorded in the well dated Late Triassic beds of Brazil. In that time span, apart from achieving a more herbivorous diet, sauropodomorph dinosaurs increased their size in a ratio of 230% and their typical long neck was also established, becoming proportionally twice longer than those of basal taxa. Indeed, the new dinosaur is the oldest-known sauropodomorph with such an elongated neck, suggesting that the ability to feed on high vegetation was a key trait achieved along the early Norian. Finally, the clustered preservation mode of the skeletons represents the oldest evidence of gregarious behaviour among sauropodomorphs.

Authors+Show Affiliations

Programa de Pós Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil rodrigotmuller@hotmail.com. Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, Universidade Federal de Santa Maria, São João do Polêsine, RS 598, 97230-000, Brazil.Laboratório de Paleontologia, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil.Centro de Apoio à Pesquisa Paleontológica da Quarta Colônia, Universidade Federal de Santa Maria, São João do Polêsine, RS 598, 97230-000, Brazil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30463923

Citation

Müller, Rodrigo Temp, et al. "An Exceptionally Preserved Association of Complete Dinosaur Skeletons Reveals the Oldest Long-necked Sauropodomorphs." Biology Letters, vol. 14, no. 11, 2018.
Müller RT, Langer MC, Dias-da-Silva S. An exceptionally preserved association of complete dinosaur skeletons reveals the oldest long-necked sauropodomorphs. Biol Lett. 2018;14(11).
Müller, R. T., Langer, M. C., & Dias-da-Silva, S. (2018). An exceptionally preserved association of complete dinosaur skeletons reveals the oldest long-necked sauropodomorphs. Biology Letters, 14(11). https://doi.org/10.1098/rsbl.2018.0633
Müller RT, Langer MC, Dias-da-Silva S. An Exceptionally Preserved Association of Complete Dinosaur Skeletons Reveals the Oldest Long-necked Sauropodomorphs. Biol Lett. 2018 11 21;14(11) PubMed PMID: 30463923.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An exceptionally preserved association of complete dinosaur skeletons reveals the oldest long-necked sauropodomorphs. AU - Müller,Rodrigo Temp, AU - Langer,Max Cardoso, AU - Dias-da-Silva,Sérgio, Y1 - 2018/11/21/ PY - 2018/09/06/received PY - 2018/10/22/accepted PY - 2018/11/23/entrez PY - 2018/11/23/pubmed PY - 2019/9/13/medline KW - Brazil KW - Dinosauria KW - Norian KW - Saurischia KW - Triassic KW - evolution JF - Biology letters JO - Biol Lett VL - 14 IS - 11 N2 - The rise of sauropodomorphs is still poorly understood due to the scarcity of well-preserved fossils in early Norian rocks. Here, we present an association of complete and exceptionally well-preserved dinosaur skeletons that helps fill that gap. They represent a new species, which is recovered as a member of a clade solely composed of Gondwanan Triassic taxa. The new species allows the definition of a set of anatomical changes that shaped sauropodomorph evolution along a period from 233 to 225 Ma, as recorded in the well dated Late Triassic beds of Brazil. In that time span, apart from achieving a more herbivorous diet, sauropodomorph dinosaurs increased their size in a ratio of 230% and their typical long neck was also established, becoming proportionally twice longer than those of basal taxa. Indeed, the new dinosaur is the oldest-known sauropodomorph with such an elongated neck, suggesting that the ability to feed on high vegetation was a key trait achieved along the early Norian. Finally, the clustered preservation mode of the skeletons represents the oldest evidence of gregarious behaviour among sauropodomorphs. SN - 1744-957X UR - https://www.unboundmedicine.com/medline/citation/30463923/An_exceptionally_preserved_association_of_complete_dinosaur_skeletons_reveals_the_oldest_long_necked_sauropodomorphs_ L2 - https://royalsocietypublishing.org/doi/10.1098/rsbl.2018.0633?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -